Thanks Jason.
I think you will have to wait until Eaton makes them available. Other then that I am not sure where you could get them. Your other choices are Detroit or ARB. But I would not want two different lockers.
I have not found any situation where I couldnt get over things by not having them.
Being that you have an 03 you have the ability to lock your truck and or use BTM.
If it were me I would wait for the Eaton after market to come out. Not sure when that will be but I have heard they are working on it.
Mark Weber
Webman
www.wisconsinhummerowners.com